What is the difference between the private and protected labels (if there's any)?

Question

I'm just a little confused about the difference and the usage of these labels.

Answer 1

private: Only members of the same class can access.
protected: Is like private but derived classes can also access.

Answer 2

oops is like your real world. try to relate it.

real world: private something that you only share with your family members living in the same house.
oops equivalent: private members can only be shared within class.

real world: private things can also be shared with friends.
oops equivalent: friend functions can access private members of the class.

real world: protected things are things that you own but can be shared among your family members.
oops equivalent: protected members can be shared with derived classes.

real world: public things are things that can be shared with anyone.
oops equivalent: public members can be shared with anyone.

its easier to understand concepts if you relate them with real world examples, afterall they were developed in similar fashion.

note: its just for understanding of concepts don't stick to them as rules.